Data Fields

Detailed Description

An ATA Logical Block Address.

ATA controllers have three byte-wide registers for specifying the block address: LBA Low, LBA Mid and LBA High. This allows for a 24-bit address. Some devices support the "48-bit address feature
set" (LBA48), in which case each of these byte-wide registers is actually a two-entry FIFO, and the "previous" byte pushed into the FIFO is used as the corresponding high-order byte. So, to set up the 48-bit address 0x123456abcdef, you would issue